The square root of (7 + 3√5)(7

The square root of (7 + 3√5)(7 - 3√5) is:

A √5

B 2

C 4

D 3√5

Correct Answer: Option B

(7 + 3√5)(7 - 3√5) এর বর্গমূল
= √{(7 + 3√5)(7 - 3√5)}
= √{7² - (3√5)²}
= √(49 - 45)
= √4
= 2